# Question

Which of the following is not a reason for sampling? Explain.

a. The destructive nature of some tests.

b. High cost of studying the entire population.

c. The expense of obtaining random numbers.

a. The destructive nature of some tests.

b. High cost of studying the entire population.

c. The expense of obtaining random numbers.

## Answer to relevant Questions

Which statement is correct? Why not the others? a. Likert scales are interval if scale distances are meaningful. b. Cross-sectional data are measured over time. c. A census is always preferable to a sample. In this regression with n = 40, which predictor differs significantly from zero at α = .01? a. X2 b. X3 c. X5 In a test of the regression model Y = β0 + β1 with 27 observations, what is the critical value of t to test the hypothesis β1 = 0 using α = .05 in a two-tailed test? a. 1.960 b. 2.060 c. 1.708 In the previous problem, calculate (a) The 95th percentile of vehicle speeds (i.e., 95 percent below); (b) The lowest 10 percent of speeds; (c) The highest 25 percent of speeds (3rd quartile). If the payoff of a risky investment has three possible outcomes ($1,000, $2,000, $5,000) with probabilities .60, .30, and .10 respectively, find the expected value. a. $1,500 b. $2,300 c. $1,700Post your question

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